Electric-current governor for dynamo-electric machines.



L. ROSBNBAUM & F. VOGLHUT. ELECTRIC CURRENT GOVERNOR POE DYNAMO ELECTRICMACHINES.

APPLICATION FILED JAN. 30, 1908.

Patented Jan. 5, 1909.

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WITNESSES B) 2 2 ATTORNEY UNITED srnrnfs 1 ;on 1rroE.

LEOPOLD ROSENBAUM AND FRA-N K VOGLHUT, OFNEW YORK, N. Y., ASSIGNORS, BYDIRECT AND MESNE ASSIGNMENTS, OF ONE-FOURTH TO MOSES RADIN ANDONE-FOURTH TO 1 ISAAC GERSTEIN, OF NEW- YQRK, N. Y.

ELECTRIC-CURRENT eovnrmon son Dynamo-anaemic Mecnmns.

Specification of Letters Patent.

Patented Jan. 6, 1909.

Application filed January 30, 1908. Serial No. 413,382.

To all whom it may concern:

Be it known that we, LEOPOLD BAUM and FRANK VOGLHUI, subjects of theEmperor of Austria, having, however, duly declared our intention ofbecoming citizens of the United States, and residents of New York city,N. Y. have invented certain new and useful Improvements inElectric-Current Governors for Dynamo-Electric Machines, of

automatically regulate the current from a small dynamo, when the same isused in the sparking circuit of a gasolene engine of an automobile, andwhen the invention is used in this connection, it will effectuallyprevent the burning out of coils, contact fingers, etc. when the speedof the machine is increased.

The invention will be described in detail with reference to theaccompanying drawing comprising a side elevational view, partly insection.

Referrin to the drawing, A designates the armature s aft of a dynamoelectric machine (not shown), which is operatively connected with themain shaft B of the centrifugal device by means of the beveled gearwheels a Z), whereby the shaft B is speeded with corresponding velocityto the velocity of the dynamo electric machine. It is evident, however,that this connection may be made in any way that permits the speed ofthe shaft B to vary in proportion to the speed of the armature shaft.The shaft B is mounted in a suitable bearing block B supported in anysuitable manner, as by the bracket arm C attached to the body of themachine or other suitable support. Connected to this main shaft Bandforming a continuation thereof, but insulated therefrom as shown atb. is an auxiliary shaft D. Attached to this auxiliary shaft at its toso as to rotate therewith are the revolub e centrifugal arms (I d, whicharms are pivoted at d so as to permit the same to move upwardly or down-ROSEN- wardly. Said arms are also connected by means of the pivotedlinks E E and the slidmg collar F. A suitable resisting device, such asthe spring G, may be em loyed to resist the upward movement of t esliding collar.

Surrounding the centrifugal device just described is a rheostatic box Hof metal or other suitable material, which, as shown, is bored out atits bottom to ermit the shaft B to project upwardly theret rough, and issecured to the outer edge of the bearing block B by means of screwthreads, as shown at h, or in any'other suitable manner.- Within the boxH and insulated therefrom and from each other by layers of mica or othersuitable insulating material are a series of resistance terminal plates11 i. The central ortion of these plates i i, together with the aternately disposed layers of insulating material 7' j are so shaped orhollowed out as to form a cupshaped basin surrounding the centrifugaldevice. To these plates "L i are connected a series of binding posts 1cL", which are likewise insulated from said boX H, and to the bindingposts 7c is are connected the resistances r r. A cap H is secured to theupper end of the box H by means of screw threads at H and serves to keepthe terminal plates in posltion.

The centrifugal arms (1 d are provided at or near their ends with theweights (12 61 which as shown are in the form of a ball. The weights areprovided with bores (Z into which are fitted with a sliding fit thebrushes (1 d of carbon or other suitable material. A spring M isinterposed between the end of said bore and the brush, so as to keep thesame in constant engagement with the cupshaped basin formed by theplates i i and their insulation. It is obvious that other suitable meansmight be employed for forming the connection between the centrifugalarms (1 d and the plates i i, and we do not therefore limit ourselves tothe precise means shown.

Electrical connection is made with the top of the shaft D by means ofthe spring contact N, or other suitable device, and with the bindingposts, 7c is.

It will be seen that by this construction, the parts may be so arrangedthat when the speed increases above a predetermined amount thecentrifugal weighted arms (1 (Z will fly-out and move the brushes d (1up- The operation of the device will be clear from the foregoingdescription.

Having described our invention, what we claim and. desire to secure byLetters Patent 1. An electric current governor for dynamo electricmachines comprising a rotatable shaft connected with the moving part ofthe machine, a centrifugal device secured to said shaft, brushes carriedby said centrifugal device and a rheostatic device having re-, sistanceterminals surrounding these centrifugal devices and adapted to connectwith the brushes to increase or decrease the resistance.

2. An electric current governor for dynamo electric machines comprisinga rotatable shaft connected to the moving part of the machine, aplurality of centrifugal arms connected with said shaft and rotatingtherei with, brushes carried by such arms, insulated resistance terminalplates surrounding the centrifugal arms, and means for keeping saidbrushes and terminal plates in constant contact as the centrifugal armsrotate. 3. An electric current governor for dynamo electric machinescomprising a rotatable shaft connected with the armature shaft of themachine, weighted centrifugal arms connected to and rotating with saidshaft, adjustable brushes carried by said arms, superimposed insulatedresistance terminal lates surrounding the centrifugal arms and forming acult; shaped basin, springs for forcing the brus es into contact Withsuch terminal plates as the centrifugal arms rotate.

In witness whereof, we have hereunto subscribed our names 1n thepresence of two subscnbmg' witnesses LEOPOLD ROSENBAUM. FRANK VOGLHUT.

Witnesses:

Jos. F. OBRIEN, FRANK G. SCHWAB.

